Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Amounts Recognized on the Balance Sheet (Details)

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Employee Benefit Plans - Amounts Recognized on the Balance Sheet (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]    
Other Assets $ 164,605 $ 145,686
Qualified Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other Assets 676 246
Accrued Expenses And Other Liabilities (57) (67)
Net Amount Recognized at December 31 619 179
Nonqualified and Other Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other Assets 908 1,096
Accrued Expenses And Other Liabilities (1,179) (1,172)
Net Amount Recognized at December 31 (271) (76)
Postretirement Health and Life Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other Assets 0 0
Accrued Expenses And Other Liabilities (1,488) (1,528)
Net Amount Recognized at December 31 (1,488) (1,528)
Non-U.S. Pension Plans [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Other Assets 220 342
Accrued Expenses And Other Liabilities (374) (304)
Net Amount Recognized at December 31 $ (154) $ 38